[Elecraft] Re: Elecraft Digest, Vol 37, Issue 15 - K3 N type
That was 1 of my first questions to Wayne, his reply: We'll be supplying only SO239s, but you could replace them with N-type yourself, assuming they'd fit. It's a tight squeeze with the ATU installed. 73, Wayne N6KR On 7/5/07 02:08, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> sent: > Message: 9 > Date: Sun, 06 May 2007 13:58:12 +0100 > From: Dave G4AON <[EMAIL PROTECTED]> > Subject: Re: [Elecraft] Expect delays in our responses to K3 questions > for awhile > In reply to: > "A couple of questions I didn't see answered there (perhaps I missed them) > are:" > > While the antenna sockets are SO239, I hope they offer N types as an option. > It would be nice for Elecraft to lead the field instead of being one of the > followers. > After all, HP and Rohde & Schwarz don't use SO239 connectors on their kit, why > should Elecraft? > > If any of the UK dealers do wake up to Elecraft, I too hope we can still order > direct. It's hard to beat Elecraft for service. > > Dave, G4AON > K1, K2 and soon K3/100 -- If all our misfortunes were laid in one common heap whence everyone must take an equal portion, most people would be contented to take their own and depart. -Socrates (469?-399 B.C.) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: Elecraft Digest, Vol 37, Issue 15 - K3 N type
Myself I use high-quality pressure-connection PL259's (about $6 a pop), these are fine. Maybe another little extra Elecraft could offer, some PL259 are wretchedly bad. Just found a picture of some decent PL259 http://www.diodecomms.co.uk/images/UHFAIR7.jpg which are lots better than http://www.maeselectronics.be/images/plug/PL259_7.jpg IMHO. Simon Brown, HB9DRV - Original Message - From: "David Ferrington" <[EMAIL PROTECTED]> We'll be supplying only SO239s, but you could replace them with N-type yourself, assuming they'd fit. It's a tight squeeze with the ATU installed. 73, Wayne N6KR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Elecraft Digest, Vol 37, Issue 15
I would probably not have ordered the K3 if it were not for the good exchange rate. Regardless of that good rate, I don't see big reductions in dealer prices for US kit. 73 M0XDF On 7/5/07 02:08, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> sent: > Message: 28 > Date: Sun, 6 May 2007 18:55:30 +0100 > From: "m1bnw" <[EMAIL PROTECTED]> > Subject: [Elecraft] Elecraft UK Distribution. No Thank You! > To: > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=response > > I agree with the comments here. > If we ever end up with Elecraft selling only through UK dealers we would end > up paying £1 for every $1 of original price. > That would end it for me. > Regards Colin -- It came to me that reform should begin at home, and since that day I have not had time to remake the world. -Will Durant, historian (1885-1981) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] G/K6DBG/P
Not to derail the K3 discussions, but :-) I'm in Manchester for the week, and brought my KX1 along. If someone reading this list is nearby, I'd love to get together for a pint or get suggestions for some place I can throw a wire into a tree without getting arrested... 73 de chris K6DBG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] XV432 low output power
Hi Folks, I wonder if I can pick the collective brain about my XV432 which has low power output. I am driving the transverter with my K2 and the XV60. This is all fine as my XV144 performs perfectly. The problem is in my XV432. Key down I get about 7W output for the first second or so then as they key is held down the output drops along a pseudo logarithmic curve. The K2 indicates that the drive power is falling (this does not happen with my XV144). The typical voltages at active devices are OK (except for those which are cited for 20W output of course). The RX side seems OK, but I don't really have any serious test gear to run it against. R22, the input attenuator is fully CW, i.e. least attenuation. This suggests that there is not enough drive, but the tx voltage at output pin of U6 is fine. Could I have I partially toasted the factory installed amplifier (U6 - I hope not). Perhaps the drop in output power could imply a filter problem? I have checked all of the jumpers several times to see if is this an RTFM issue, but I am now stuck. Any suggestions? 73 Steve M0BPQ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] start without ANY extra roofing filters....
I wrote: > Bottom line: 1. Narrower is not always better (Ten-Tec experience) 2. 8-poles is not always better than 5-poles (per Inrad) 3. Let IMD and BDR measurements be your guide More evidence below to support waiting for IMD/BDR measurements before ordering any roofing filters. 73, Bill W4ZV http://mailman.qth.net/pipermail/1000mp/2007-April/020755.html There is a fascinating article describing IMD tests on the IC-7800 by DC4KU in CQ-DL, August 2005 (in German). In these tests, IP3 at 2 kHz offset degrades by an astounding 16 dB when switching from the 15 kHz to the 6 kHz roofing filter. This degradation is due to passive IMD in the filter, and possibly also to IMD in the filter driver amplifiers caused by mismatch when the filter is excited outside its passband. I can send you an English-language summary of the relevant part privately, if you wish. It is highly significant that professional receivers manufactured by the likes of R&S, Rockwell-Collins, Racal and Harris have a single roofing filter. This filter is typically 12 to 16 kHz wide, to pass multi-channel ISB, VFT (multiplexed teletype) and high-speed crypto, all of which have extremely stringent in-band IMD requirements. To quote a British engineer who used to design shipboard HF receivers for the Royal Navy: The up-converting architecture, with a roofing filter at a first IF above the highest RF frequency, allows the designer to limit the bandwidth presented to the first IF chain and second mixer. The bandwidth of this filter is a trade-off. Its 3 dB BW must be sufficient to pass the widest emission the receiver is required to handle, but not so narrow that IMD and temperature-drift effects in the filter become a concern. Cheers for now, 73, Adam VA7OJ/AB4OJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] RFC Component Identification
Hi to the list, Hopefully some one will confirm what I think is the RFC's. I'm currently building the 40m receiver (RF Board stage 2) I think I have identified the RFC's which are similar to resistors but thicker in their body shape with the leads axially. Like resistors they are marked with various colour bands to mark their value with a 4 band to mark tolerance e.g. silver/gold. some of the bodies are tan, some are green. The photo and parts list says they should all be green. unfortunately I can't measure Inductance on my DMM. Is there any measurement on my DMM e.g. resistance that would indicate that these are the RFC's? I'm thinking would they have a typical resistance possibly a low one? I also have one separate one which has a tan body , colour markings green red/brown green with a gold tolerance mark, similar to a 1/8 watt resistor which I believe is the sub miniature one used on the underside of the RF Board PC for the modification near C191. Thanks in advance. 73 Gary G7USC Gary McKelvie G7USC Web : www.garym.org.uk Mobile : +447968501863 MSN Messenger : [EMAIL PROTECTED] So Long and Thanks for all the Fish ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] New "Remote Mic Header" Aftermarket K2 Accessory
On Mon, 07 May 2007 Dave (G4AON) wrote ... Shouldn't Elecraft decide on a standard microphone connection and stick with it? I suspect they probably have ... use a Kenwood microphone, then ... "jumper" ... the adjacent pins which avoids soldering ... on the pins. ... the Kenwood MC-43S ... appears to be very good value. -- Dave, Are you suggesting that the required "rewiring" for all other microphones be done external to the K2? Gary ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: RFC Component Identification
Hi All, Thanks to Tom N0SS and Steve K0PQ for the speed replies they've answered my query, much appreciate guys. 73 Gary G7USC At 12:02 07/05/2007, Gary McKelvie wrote: Hi to the list, Hopefully some one will confirm what I think is the RFC's. I'm currently building the 40m receiver (RF Board stage 2) I think I have identified the RFC's which are similar to resistors but thicker in their body shape with the leads axially. Like resistors they are marked with various colour bands to mark their value with a 4 band to mark tolerance e.g. silver/gold. some of the bodies are tan, some are green. The photo and parts list says they should all be green. unfortunately I can't measure Inductance on my DMM. Is there any measurement on my DMM e.g. resistance that would indicate that these are the RFC's? I'm thinking would they have a typical resistance possibly a low one? I also have one separate one which has a tan body , colour markings green red/brown green with a gold tolerance mark, similar to a 1/8 watt resistor which I believe is the sub miniature one used on the underside of the RF Board PC for the modification near C191. Thanks in advance. 73 Gary G7USC Gary McKelvie G7USC Web : www.garym.org.uk Mobile : +447968501863 MSN Messenger : [EMAIL PROTECTED] So Long and Thanks for all the Fish Gary McKelvie G7USC Web : www.garym.org.uk Mobile : +447968501863 MSN Messenger : [EMAIL PROTECTED] So Long and Thanks for all the Fish ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] New "Remote Mic Header" Aftermarket K2 Accessory
Dave, Lyle confirmed that the mic jack in the K3 is wired for Elecraft - just like the K2 with all pins of the mic configuration header plugged straight across. That wiring is not for all Kenwood mics. Kenwood mics with an internal preamp expect to have voltage on pin 5, and the Elecraft has voltage on pin 6, but all Kenwood mics without an internal preamp (not connecting to a voltage pin) will work. Elecraft is again offering the MH2 mic with the advent of the K3 to address the need for an Elecraft mic. 73, Don W3FPR Dave G4AON wrote: Shouldn't Elecraft decide on a standard microphone connection and stick with it? I suspect they probably have as the K3 appears to be "Kenwood 8 pin" with no alternatives, if I remember correctly an earlier post from Eric. If anyone building their K2 wishes to use a Kenwood microphone, then computer 2 pin "jumper" connections link the adjacent pins which avoids soldering wires on the pins. Here in the UK, Waters and Stanton (http://www.wsplc.com/) list the Kenwood MC-43S fist microphone at 19.95 GBP, which appears to be very good value. I use one on my K2 and it works fine. 73 Dave, G4AON K1, K2 and K3 on order. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] New "Remote Mic Header" Aftermarket K2 Accessory
Gary, Yes, the K3 does not have a mic configuration header like the K2. The mic jack is wired for the Elecraft pinout (per Lyle Johnson) and those wanting to use a mic with a different wiring scheme will either have to re-wire the mic plug or use some sort of adapter. It certain eliminates much of the confusion indicated by the many questions of "How do I use my XYZ mic with my K2" The answer to that now is the same as for any other transceiver - re-wire the mic plug to the Elecraft pinout, and it will work for the K3 or the K2 with all mic headers jumpered straight across. 73, Don W3FPR Gary Hvizdak wrote: On Mon, 07 May 2007 Dave (G4AON) wrote ... Shouldn't Elecraft decide on a standard microphone connection and stick with it? I suspect they probably have ... use a Kenwood microphone, then ... "jumper" ... the adjacent pins which avoids soldering ... on the pins. ... the Kenwood MC-43S ... appears to be very good value. -- Dave, Are you suggesting that the required "rewiring" for all other microphones be done external to the K2? Gary ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Ultimatic keying in KX1/K1?
Mike, It's my understanding that the MODE is a function of the chip being used. At this time I know of three Ultimatic units. The cube keyer that goes with that mini Palm paddle key (the newer cube), the offerings from Jackson Harbor - I think the PK4 chip (that's used the new Palm), and there's a keyer for about $17 that is constantly for sale on that Auction site (I think it comes up when searching on QRP) Unfortunately, I don't believe the older PK3 chip is plug to plug compatible. That is, you can't take a keyer based on the PK3 Chip and plug in the PK4. I think the circuit board for the basic keyer (not a lot of memories) is pretty small. So you might be able to stick in inside the rig and just wire it to the key jack - or you can install it as a small box at the key end - sort of in-line with your key. I became aware of ultramatic - an old Ten Tec mode - in discussion in the FISTS newsgroup. Like you (and me) many did not like the iambic keyer action but wanted to use a dual paddle. There was a great cheer in the newsgroup when a member reminded them of Ultramatic mode. It was just what they wanted. Good luck and 73, Paul ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Ultimatic keying in KX1/K1?
The K1EL keyers also support Ultimatic mode. They are small inexpensive PC boards. I use the K12 to provide Ultimatic mode, much easier for me. I too would like to see the KX1 and K1 rigs provide Ultimatic keying. The K2 is not a problem for me - the external keyer works fine, but it would be nice to have Ultimatic 'inside' the K2 and K3 too. 73, Don W3FPR Paul wrote: Mike, It's my understanding that the MODE is a function of the chip being used. At this time I know of three Ultimatic units. The cube keyer that goes with that mini Palm paddle key (the newer cube), the offerings from Jackson Harbor - I think the PK4 chip (that's used the new Palm), and there's a keyer for about $17 that is constantly for sale on that Auction site (I think it comes up when searching on QRP) Unfortunately, I don't believe the older PK3 chip is plug to plug compatible. That is, you can't take a keyer based on the PK3 Chip and plug in the PK4. I think the circuit board for the basic keyer (not a lot of memories) is pretty small. So you might be able to stick in inside the rig and just wire it to the key jack - or you can install it as a small box at the key end - sort of in-line with your key. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] WA3WSJ's AT Hike & QRP
Hello all, I will start my AT hike tomorrow and hike around 40 miles over four days. I'll start in the Town of Duncannon, PA and end at Swatara State Park, PA. This hike will take me through Anthony's Wilderness which is one of the most beautiful parts of the AT in PA. I'll have company as Trevor Boy, my dog, will be hiking with me. Look for me on 20m, 30, or 40m around 6-8pm and in the mornings starting Wednesday around 8am - 10am. I'll be using my KX1 with my Bead-Wire Antenna. 72, Ed,WA3WSJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] start without ANY extra roofing filters....
Well done, Bill. This again shows the importance of real life measurements... and why I didn't order any filters until more is known about them. Anybody interested in the subject of filter design must read the article by list member Jack, K8ZOA in the current QEX. It gives a lot of valuable xtal filter design insight, and has a page of excellent references at the end for those who wish to read more on the subject. This is a complex subject, but as Jack points out, proper characterization of the crystals and rigorous attention to detail can produce accurate models and repeatable designs. Jack touched on drive level dependency in his article. Perhaps he can focus in on the effects of xtal nonlinearity as it affects IMD for a future piece (not trying to create work for you Jack ;-) This is a subject which seems to be gaining in importance as receiver designs surrounding the xtal filter seem to be improving to the point where the filters are becoming the limiting factor in IMD performance. 73, Larry N8LP Bill Tippett wrote: I wrote: > Bottom line: 1. Narrower is not always better (Ten-Tec experience) 2. 8-poles is not always better than 5-poles (per Inrad) 3. Let IMD and BDR measurements be your guide More evidence below to support waiting for IMD/BDR measurements before ordering any roofing filters. 73, Bill W4ZV http://mailman.qth.net/pipermail/1000mp/2007-April/020755.html There is a fascinating article describing IMD tests on the IC-7800 by DC4KU in CQ-DL, August 2005 (in German). In these tests, IP3 at 2 kHz offset degrades by an astounding 16 dB when switching from the 15 kHz to the 6 kHz roofing filter. This degradation is due to passive IMD in the filter, and possibly also to IMD in the filter driver amplifiers caused by mismatch when the filter is excited outside its passband. I can send you an English-language summary of the relevant part privately, if you wish. It is highly significant that professional receivers manufactured by the likes of R&S, Rockwell-Collins, Racal and Harris have a single roofing filter. This filter is typically 12 to 16 kHz wide, to pass multi-channel ISB, VFT (multiplexed teletype) and high-speed crypto, all of which have extremely stringent in-band IMD requirements. To quote a British engineer who used to design shipboard HF receivers for the Royal Navy: The up-converting architecture, with a roofing filter at a first IF above the highest RF frequency, allows the designer to limit the bandwidth presented to the first IF chain and second mixer. The bandwidth of this filter is a trade-off. Its 3 dB BW must be sufficient to pass the widest emission the receiver is required to handle, but not so narrow that IMD and temperature-drift effects in the filter become a concern. Cheers for now, 73, Adam VA7OJ/AB4OJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] New "Remote Mic Header" Aftermarket K2 Accessory
Shouldn't Elecraft decide on a standard microphone connection and stick with it? Dave, They did. It's the same default mic configuration as the K2, which happens to be the same as Kenwood. 73 and Tnx Greg AB7R On Mon, 07 May 2007 07:32:16 +0100 Dave G4AON <[EMAIL PROTECTED]> wrote: Shouldn't Elecraft decide on a standard microphone connection and stick with it? I suspect they probably have as the K3 appears to be "Kenwood 8 pin" with no alternatives, if I remember correctly an earlier post from Eric. If anyone building their K2 wishes to use a Kenwood microphone, then computer 2 pin "jumper" connections link the adjacent pins which avoids soldering wires on the pins. Here in the UK, Waters and Stanton (http://www.wsplc.com/) list the Kenwood MC-43S fist microphone at 19.95 GBP, which appears to be very good value. I use one on my K2 and it works fine. 73 Dave, G4AON K1, K2 and K3 on order. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 USB Adapter
I bought a SABRENT SBT-USC1K USB-COM adapter from www.newegg.com back in Mar 2005. Works great under XP Home, and Pro. Installs as a Prolific adapter, which seems to be one of the better ones. Total cost incl S/H was a tad over $15 USD. No problems using it w/my IC-703+, FT-817, or K2. I fully expect it to work w/the K3. No problems either w/my Keyspan 4-port USB <==> com port hub. Of course, Vista (Advisor) spit out the Keyspan as something it (Vista Advisor) didn't like...which is one of a number of reasons why I won't be donating to the Bill Gates Retirement Fund any time soon! 72 de N8PVZ ---bernie Usual disclaimers as to no financial involvement w/any mentioned comapy. Shoobie Doobie Do! ---Sinatra Yabba Dabba Doo! ---Flinstone Bored stiff? Loosen up... Download and play hundreds of games for free on Yahoo! Games. http://games.yahoo.com/games/front ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] (no subject)
Hi Chris, I'm just outside of Chester (approx 30-40 minutes away) if you need some where to throw the antenna up and don't mind travelling i know a very good spot about 1/2 mile away from me. If you want give me a ring on my mobile number which is in my signature. 73 Gary G7USC Chris K6DBG wrote the following >Not to derail the K3 discussions, but :-) >I'm in Manchester for the week, and brought my KX1 along. If someone >reading this list is nearby, I'd love to get together for a pint or >get suggestions for some place I can throw a wire into a tree without >getting arrested. >73 de chris K6DBG Gary McKelvie G7USC Web : www.garym.org.uk Mobile : +447968501863 MSN Messenger : [EMAIL PROTECTED] So Long and Thanks for all the Fish ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] start without ANY extra roofing filters....
This I have noticed during my own IP3 measurements on my FT-1000D, not as much as 16dB but around 3 dB. This was with the INRAD roofing filter and 2 kHz offset. in any case this was enough for me not to use the filter. I´m eagerly waiting for measurement figures on the K3. Beats me why they can´t be presented, that I don´t understand at all, after all it´s no rocket sience. This will also help people select the roofing filter. Maybe I just have to by one and measure myself, then atleast I know it´s done right. /SM2EKM --- Bill Tippett wrote: I wrote: > Bottom line: 1. Narrower is not always better (Ten-Tec experience) 2. 8-poles is not always better than 5-poles (per Inrad) 3. Let IMD and BDR measurements be your guide More evidence below to support waiting for IMD/BDR measurements before ordering any roofing filters. 73, Bill W4ZV http://mailman.qth.net/pipermail/1000mp/2007-April/020755.html There is a fascinating article describing IMD tests on the IC-7800 by DC4KU in CQ-DL, August 2005 (in German). In these tests, IP3 at 2 kHz offset degrades by an astounding 16 dB when switching from the 15 kHz to the 6 kHz roofing filter. This degradation is due to passive IMD in the filter, and possibly also to IMD in the filter driver amplifiers caused by mismatch when the filter is excited outside its passband. I can send you an English-language summary of the relevant part privately, if you wish. It is highly significant that professional receivers manufactured by the likes of R&S, Rockwell-Collins, Racal and Harris have a single roofing filter. This filter is typically 12 to 16 kHz wide, to pass multi-channel ISB, VFT (multiplexed teletype) and high-speed crypto, all of which have extremely stringent in-band IMD requirements. To quote a British engineer who used to design shipboard HF receivers for the Royal Navy: The up-converting architecture, with a roofing filter at a first IF above the highest RF frequency, allows the designer to limit the bandwidth presented to the first IF chain and second mixer. The bandwidth of this filter is a trade-off. Its 3 dB BW must be sufficient to pass the widest emission the receiver is required to handle, but not so narrow that IMD and temperature-drift effects in the filter become a concern. Cheers for now, 73, Adam VA7OJ/AB4OJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Keyboard
I've not read anything specific on how the keyboard will work, but since PSK/etc is sent via cw paddle or keyboard, I'm wondering if the keyboard plugs into the keyjack and sends CW to the rig? Would be a nifty thing, what w/K3 also decoding CW; you could have keyboard to keyboard CW contacts w/o effort...of course other factors like the other person's sending, band conditions, QRM/N/QSB/etc would definitely be at play. But, hey, who knows, maybe I'll be able to make my first CW contact after almost 16yrs in the "business". (Made Extra after FCC dropped CW to 5wpm, altho I did pass the 13wpm General code test). Anyway, just my two drachma's worth on how the keyboard may work. Totally unscientific and wild-eyed guess on my part. 72 de N8PVZ ---bernie gaffney Shoobie Doobie Do! ---Sinatra Yabba Dabba Doo! ---Flinstone __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] start without ANY extra roofing filters....
Hat tip to Larry ... now all I need is a commission on every QEX sold ... Crystals are non-linear and their motional parameters are, to some degree or other, a function of drive voltage. Since a filter's loss is a function of its motional parameters, the corollary to that is intermodulation can and will be caused by what we think of as purely passive elements such as crystals. (This phenomenon is also found in ferrite cores and powdered iron core inductors, as they have a non-linear B versus H curve.) There are examples of receivers that have as the limiting IP3 crystal filter intermodulation. See Experimental Methods in RF Design for a discussion of Wes Hayward's observation of crystal filter IMD when building a receiver featured in that book. It's devilishly hard to measure crystal filter IMD, however, for a variety of reasons. This is why a filter with fewer elements (poles) can, in some circumstances, yield a better IP3 than a filter with more poles, as counter-intuitive as that might seem. Whilst the filter with more poles will keep more trash out of later receiver stages, small changes to the motional parameters of the crystals that make up the filter with more poles will have a greater effect on the filter's transfer function than for a filter with the same crystals but fewer poles. Thus, although later stages are better protected from undesired signals, that very protection itself causes intermodulation interference. That's why a high performance receiver must be designed in a holistic fashion. Jack K8ZOA Larry Phipps wrote: Well done, Bill. This again shows the importance of real life measurements... and why I didn't order any filters until more is known about them. Anybody interested in the subject of filter design must read the article by list member Jack, K8ZOA in the current QEX. It gives a lot of valuable xtal filter design insight, and has a page of excellent references at the end for those who wish to read more on the subject. This is a complex subject, but as Jack points out, proper characterization of the crystals and rigorous attention to detail can produce accurate models and repeatable designs. Jack touched on drive level dependency in his article. Perhaps he can focus in on the effects of xtal nonlinearity as it affects IMD for a future piece (not trying to create work for you Jack ;-) This is a subject which seems to be gaining in importance as receiver designs surrounding the xtal filter seem to be improving to the point where the filters are becoming the limiting factor in IMD performance. 73, Larry N8LP Bill Tippett wrote: I wrote: > Bottom line: 1. Narrower is not always better (Ten-Tec experience) 2. 8-poles is not always better than 5-poles (per Inrad) 3. Let IMD and BDR measurements be your guide More evidence below to support waiting for IMD/BDR measurements before ordering any roofing filters. 73, Bill W4ZV http://mailman.qth.net/pipermail/1000mp/2007-April/020755.html There is a fascinating article describing IMD tests on the IC-7800 by DC4KU in CQ-DL, August 2005 (in German). In these tests, IP3 at 2 kHz offset degrades by an astounding 16 dB when switching from the 15 kHz to the 6 kHz roofing filter. This degradation is due to passive IMD in the filter, and possibly also to IMD in the filter driver amplifiers caused by mismatch when the filter is excited outside its passband. I can send you an English-language summary of the relevant part privately, if you wish. It is highly significant that professional receivers manufactured by the likes of R&S, Rockwell-Collins, Racal and Harris have a single roofing filter. This filter is typically 12 to 16 kHz wide, to pass multi-channel ISB, VFT (multiplexed teletype) and high-speed crypto, all of which have extremely stringent in-band IMD requirements. To quote a British engineer who used to design shipboard HF receivers for the Royal Navy: The up-converting architecture, with a roofing filter at a first IF above the highest RF frequency, allows the designer to limit the bandwidth presented to the first IF chain and second mixer. The bandwidth of this filter is a trade-off. Its 3 dB BW must be sufficient to pass the widest emission the receiver is required to handle, but not so narrow that IMD and temperature-drift effects in the filter become a concern. Cheers for now, 73, Adam VA7OJ/AB4OJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (A
Re: [Elecraft] start without ANY extra roofing filters....
The IMD contributed by inductor cores used in the front-end selective circuits is often not taken into account either, or for that matter any core within the signal path. They can bite. 73, Geoff GM4ESD Larry Phipps wrote: This is a subject which seems to be gaining in importance as receiver designs surrounding the xtal filter seem to be improving to the point where the filters are becoming the limiting factor in IMD performance. 73, Larry N8LP 1. Narrower is not always better (Ten-Tec experience) 2. 8-poles is not always better than 5-poles (per Inrad) 3. Let IMD and BDR measurements be your guide More evidence below to support waiting for IMD/BDR measurements before ordering any roofing filters. 73, Bill W4ZV http://mailman.qth.net/pipermail/1000mp/2007-April/020755.html There is a fascinating article describing IMD tests on the IC-7800 by DC4KU in CQ-DL, August 2005 (in German). In these tests, IP3 at 2 kHz offset degrades by an astounding 16 dB when switching from the 15 kHz to the 6 kHz roofing filter. This degradation is due to passive IMD in the filter, and possibly also to IMD in the filter driver amplifiers caused by mismatch when the filter is excited outside its passband. I can send you an English-language summary of the relevant part privately, if you wish. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Keyboard
Bernie, The keyboard would plug into a connector on the bottom of the radio, not the CW key jack. BTW...wild-eyed can be good! Tnx and 73 Greg AB7R On Mon, 7 May 2007 08:01:45 -0700 (PDT) "Bernard Gaffney, N8PVZ/QRP" <[EMAIL PROTECTED]> wrote: I've not read anything specific on how the keyboard will work, but since PSK/etc is sent via cw paddle or keyboard, I'm wondering if the keyboard plugs into the keyjack and sends CW to the rig? Would be a nifty thing, what w/K3 also decoding CW; you could have keyboard to keyboard CW contacts w/o effort...of course other factors like the other person's sending, band conditions, QRM/N/QSB/etc would definitely be at play. But, hey, who knows, maybe I'll be able to make my first CW contact after almost 16yrs in the "business". (Made Extra after FCC dropped CW to 5wpm, altho I did pass the 13wpm General code test). Anyway, just my two drachma's worth on how the keyboard may work. Totally unscientific and wild-eyed guess on my part. 72 de N8PVZ ---bernie gaffney Shoobie Doobie Do! ---Sinatra Yabba Dabba Doo! ---Flinstone __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: start without ANY extra roofing filters....
SM2EKM: I´m eagerly waiting for measurement figures on the K3. Beats me why they can´t be presented, that I don´t understand at all, after all it´s no rocket sience. I'm surprised that so many roofing filters (and the K3 itself) have been designed and offered for sale before the specifications are known/posted. Seems like the reverse order would have been more appropriate. John Harper AE5X http://www.ae5x.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KUSB for K3
On May 7, 2007, at 7:20 AM, Thom LaCosta wrote: On Sun, 6 May 2007, Brian Lloyd wrote: But getting back to the question, insofar as the K3 is concerned, it is doing serial async RS-232. That is pretty generic. Virtually any one-USB-to-one-serial-port adaptor is going to work with your computer. I have been through 3 adpaters here that don't work with my DellI hope the KUSB does. I suspect you will find that the KUSB won't work either. I suspect you are running Windows. There you are at the mercy of each provider of the USB/serial converter to provide you with a driver that works. But as someone else said, it could be a problem with the USB port on the computer. Via made a USB 1.0 chip at one point that ended up in a lot of computers and that just didn't work right. Getting USB to work properly on those computers is a challenge and many USB devices just didn't work right as a result. So, getting USB to work depends on the following: 1. the chip(s) implementing the USB port in your computer; 2. the driver for the chip implementing the USB port in your computer; 3. the chip(s) implementing the serial-to-USB adaptor; 4. the driver provided with the serial-to-USB adaptor. If you are using a MacOS, Linux, or a flavor of UNIX you will find that there tend to be only a few generic drivers for this since the drivers are based on the chip(s) used. Windows requires a vendor- specific driver for each device. The latter means that even if you get the same hardware (serial-to-USB converter) from two different vendors (generic Taiwanese serial-to-USB adaptor), you need two different drivers for Windows but only one generic driver with MacOS, Linux, or *NIX. 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: start without ANY extra roofing filters....
AE5X: >I'm surprised that so many roofing filters (and the K3 itself) have been designed and offered for sale before the specifications are known/posted. Seems like the reverse order would have been more appropriate. I was also concerned about so many filters until I realized Elecraft has actually leveraged the Inrad 7XX series of filters offered for the 8.215 MHz IF of the FT-1000 family. I suspect they may even use the same mechanical configuration, so hopefully they have not invested R&D and inventory resources in providing the large number of 8-pole filters. http://www.qth.com/inrad/ft1000mp.htm The 5-pole and variable BW filters are apparently proprietary designs. I will be especially interested in seeing IMD/BDR measurements for the variable filters since *variable* also may imply *variable* IMD/BDR results (depending on BW). I feel it's still important to see "in radio" IMD/BDR results before selecting any filters. If the 8-pole 2.8 kHz should have better results than the stock 5-pole 2.7 kHz, I hope Elecraft will consider making the 8-pole standard with for an additional charge of $41 ($120-79) to K3's base price. IMD/BDR measurements should take most of the mystery out of the filter choice process for most of us, but IMD measurements are not totally straight-forward as KC1SX (ARRL), W2VJN (Inrad) and NC0B (Sherwood) can tell you. Let's QRX and give Elecraft a chance to do the measurements carefully. 73, Bill W4ZV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Roger beep - Repeater use (OT, not K3)
Ron wrote: >FM repeaters, for example, sometimes use the "beep" to signal when the >repeater drops the carrier, since that happens after a delay following >the last transmission. Most repeater systems which generate that "beep" do so to indicate that the time-out timer (TOT) has just reset, well before the output carrier is dropped. The TOT limits how long an uninterupted input signal will be repeated before the repeater's output transmission is stopped. The TOT resets after the *input* carrier has dropped, the beep is sent, and the repeater's output carrier stays on for several seconds longer. After the TOT reset beep has been heard, the next party may begin transmission with a re-initialized TOT. The repeater output carrier need *never* drop through a whole QSO. On repeater systems without such a TOT reset signal, only the drop out of the repeater output signal can be used to positively indicate TOT reset. In repeater applications such beeps are useful, although the volume and tone frequency seem most often to have been chosen to be as irritating as possible. Mike / KK5F ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] start without ANY extra roofing filters....
Adam (VA7OJ/AB4OJ) wrote: "It is highly significant that professional receivers manufactured by the likes of R&S, Rockwell-Collins, Racal and Harris have a single roofing filter. This filter is typically 12 to 16 kHz wide, to pass multi-channel ISB, VFT (multiplexed teletype) and high-speed crypto, all of which have extremely stringent in-band IMD requirements. To quote a British engineer who used to design shipboard HF receivers for the Royal Navy:" Adam I wouldn't get too hung up on commercial/military designs, while not wishing to start a thread running off at a tangent... a friend has a well maintained Racal RA1792 military receiver which is hopeless compared to even moderately good amateur gear such as his Kenwood TS-850, I appreciate the 1792 wasn't one of the better Racal receivers but they weren't cheap. A listening comparison - even under "non contest" conditions quickly leads to the Racal on/off switch. Add the generally poor sensitivity of those designs, weight and cost and there's no way they will ever compete with a K2 or K3. I don't come across many hams using ex military/commercial gear in preference to amateur gear... At least not those I work on QRP CW. 73 Dave K1, K2 and soon K3/100 (on order) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT mechanical v crystal filters OT
Off Topic but with so much expertise flying around I thought I would ask how mechanical filters compare with crystal filters. I think they were fairly low in frequency (455kHz?), so, not suitable in the present discussion, but it would be good for our education at least. David G3UNA ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] start without ANY extra roofing filters....
Dave G4AON wrote: Adam a friend has a well maintained Racal RA1792 military receiver which is hopeless compared to even moderately good amateur gear such as his Kenwood TS-850, I appreciate the 1792 wasn't one of the better Racal receivers but they weren't cheap. If things in the Mother Country are anything close to how they are over here in the Colonies, nothing the military buys is cheap, regardless of how well they work ... or don't :-) Fred K6DGW - Northern California Contest Club - CU in the 2007 CQP Oct 6-7 - www.cqp.org ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] OT mechanical v crystal filters OT
Its my understanding that they are not great other than they do have steep skirts. The R390 used IF transformers (tuned circuits) while the R390A had mechanical filters. The R390 was judged to work better, and the R390A was actually designed to reduce cost through the use of the mechanical filters. Although it is meaningless in an 8 MHz IF radio, I think at 50, 100, 262, or 455 KHz, tuned circuits may be best, but you likely need to design the circuit parts very carefully, and they might take up a lot of space, and be hard to adjust. Brett N2DTS > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of David Cutter > Sent: Monday, May 07, 2007 1:43 PM > To: Elecraft > Subject: [Elecraft] OT mechanical v crystal filters OT > > Off Topic but with so much expertise flying around I thought > I would ask how mechanical filters compare with crystal filters. > > I think they were fairly low in frequency (455kHz?), so, not > suitable in the present discussion, but it would be good for > our education at least. > > David > G3UNA > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Yes another K3 question..
Ok, I wont stop thinking about it till I get one, there is nothing to be done about it. I was wondering if anyone had a good idea what is going on with the knobs on the K3. The bottom row, speed/in/delay and out/power/monitor. Mic comp is also in there, so somehow the knobs do keying speed, in (compression?), delay??. The other knob does out (compression?), power (power output?), monitor ( TX monitor volume?). On the knobs above, you also have normal and I/II. Not sure I understand how these knobs might work I also wonder how the 8 band RX and TX equalizers would be set up, and I wonder if you can adjust the TX one as you transmit Will the second receiver knob do anything at all without installing the 2nd receiver? I don't expect the elecraft crew to answer any questions, they should be busy perfecting and shipping my K3 out. I guess its good and bad building a product that people are screaming for! Watch what you ask for, you might just get it? Brett N2DTS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KUSB for K3
On May 7, 2007, at 11:16 AM, Thom LaCosta wrote: On Mon, 7 May 2007, Brian Lloyd wrote: I suspect you will find that the KUSB won't work either. I suspect you are running Windows. Thought I had made it clear when I first posted about it. Sorry. There have been several go-rounds on this and I didn't go back and reread your original posting. I was working from memory, a shaky proposition at best. ;-) It would seem to me that Elecraft should look into providing a USB interface, since there are so many folks using windows and so many vendors no longer use USB. I think you mean that many no longer use RS-232 serial. I agree with you that RS-232 no longer makes a lot of sense. If I can't a converter to work, I'll get a card and waste a slot First thing to do is go to Dell and upgrade the drivers for your USB port/hub in your computer. After that look to see if there are new drivers for your USB-to-serial converter and load those. You may find it useful to uninstall all the USB devices (and their drivers) and then reinstall them. Sometimes that fixes problems that are resistant to other approaches. You also might consider using a bootable CD with Linux on it to see if their drivers will work properly with your hardware. With the world using USB, I am amazed that people don't include a USB interface. If Elecraft opted for having their own USB device then they would have to provide drivers for Windows, something I would not want to do if I were them as it would raise their tech-support requirement. By doing what they have done they have pushed the USB/converter/driver problem to someone else. That makes a lot of sense to me. OTOH I am strongly of the opinion that USB is still too low-level and hardware dependent. Ethernet makes a lot more sense as just about every computer made today has ethernet and supports TCP/IP networking. It would open up many more applications than would USB and certainly a lot more than RS-232. Many hams have either a cable or a DSL connection to the Internet. That implies that they have ethernet running already. 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Yes another K3 question..
Brett, I will post a detailed explanation on the FAQ this evening sometime. But for a short answer...The two bottom knobs are transmit controls and function based on current operating mode. The knobs function as the same tap and hold method as buttons. For example, the bottom left button will default to SPEED when in CW mode. If you HOLD it, it will then operate based on the label below the knob. So that same knob would then control the break-in delay when operating semi-break-in. The two controls on the top are receiver controls for filtering. The one on the top left you can TAP to toggle between SHIFT and LO-CUT. If you HOLD it, it normalizes the passband based on the selected IF Filter and DSP filter settings and zeros out any SHIFT. The button to the right operates the same way, but the HOLD function toggles the filter user configurations between I and II (see FAQ for more info on this). Thanks for asking and 73 Greg AB7R On Mon, 07 May 2007 14:17:03 -0400 Brett gazdzinski <[EMAIL PROTECTED]> wrote: Ok, I wont stop thinking about it till I get one, there is nothing to be done about it. I was wondering if anyone had a good idea what is going on with the knobs on the K3. The bottom row, speed/in/delay and out/power/monitor. Mic comp is also in there, so somehow the knobs do keying speed, in (compression?), delay??. The other knob does out (compression?), power (power output?), monitor ( TX monitor volume?). On the knobs above, you also have normal and I/II. Not sure I understand how these knobs might work I also wonder how the 8 band RX and TX equalizers would be set up, and I wonder if you can adjust the TX one as you transmit Will the second receiver knob do anything at all without installing the 2nd receiver? I don't expect the elecraft crew to answer any questions, they should be busy perfecting and shipping my K3 out. I guess its good and bad building a product that people are screaming for! Watch what you ask for, you might just get it? Brett N2DTS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: start without ANY extra roofing filters....
If my CAD computer design days don't fail me, I recall 8-pole type filters - had much steeper skirts, but not so hot passbands, sort of ripply. Having already forgotten the spec on group-delay (phase?) - I'll have to look that up. Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: start without ANY extra roofing filters....
Passband ripple is more a function of the filter design parameters--was it designed as a Chebyshev with 1 dB passband ripple, or a Butterworth with a flat passband, or a Gaussian with a rounded passband, etc. And, of course, those parameters govern also how fast the skirts roll off and, of great importance in many applications, how the group delay looks. All else being equal (e.g., two filters, same nominal 3 dB bandwidth, same design parameter, e.g., Chebyshev) the one with more poles will have better passband roll off, or shape factor. I can show you some four pole crystal filters I've designed and built with essentially perfectly flat passbands and others with lumpy passbands. Jack K8ZOA Fred (FL) wrote: If my CAD computer design days don't fail me, I recall 8-pole type filters - had much steeper skirts, but not so hot passbands, sort of ripply. Having already forgotten the spec on group-delay (phase?) - I'll have to look that up. Fred, N3CSY __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] New Clifton Laboratories Kit - Z100 LED CW Tuning Aid
For those having withdrawal symptoms from not having a hot soldering iron in their hands recently, I'm now accepting orders for a new kit--the Z100 CW tuning aid. Build time is between 2.5 and 3.5 hours and the kit is suitable for beginners as well as experienced kit builders. No toroids to wind, unfortunatly. But there are 24 LEDs to bend the leads on, so perhaps that will be an acceptable substitute. The Z100 uses 24 LEDs to provide a pseudo-spectrum analyzer display. After a one-time calibration procedure, to tune a CW signal in you adjust your K2 tuning knob until the two green LEDs in the center of the display flash. The display shows the degree of frequency error and the direction of the error. The result is that you can be very quickly zero beat. I've used it for a couple months in prototype and find it a useful CW tool. The Z100 also can be used for tuning RTTY and other digital modes. It's microcontroller based and will store/recall 16 center frequencies. And, I've made available the Z100's complete source code, which is small enough to be usable with the free Swordfish SE compiler. I've added a web page describing the new Z100 at http://www.cliftonlaboratories.com/z100_tuning_aid.htm. You can see it along with other Clifton Laboratory products at Dayton this year. I'll be sharing space with Larry's Telepostinc table - Booth 517. However, no sales at Dayton due to Ohio tax restrictions. Jack K8ZOA www.cliftonlaboratories.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Crystal Filters and Dynamic Range - D.R. impact and my basic recommendations
Whew! The last week has been a tidal wave of interest, orders and questions. There has been a lot of discussion and speculation on the list lately about the necessity for narrow filters ahead of the K3's DSP filtering and the impact of various filter bandwidths on receiver IMD. This in turn is creating a lot of confusion. I'd like to clarify this topic a bit. Executive Summary: Our narrow filters improve both 3rd order IMD and Blocking Dynamic range. IMD does NOT degrade when using the narrower filters. Using the DSP as the -only- narrow filtering stage will degrade IMD and Blocking dynamic range. We designed the K3 system to use both the narrow crystal and DSP filtering stages in tandem for optimal dynamic range performance. (Basic filter recommendations below.) Discussion: We have measured no serious degradation of IMD dynamic range when switching to narrower crystal filters on the K3. We carefully designed the K3 to avoid this. We isolate the crystal filters from preceding amplifier stages to optimize return loss outside the filter pass-band. Going from the 6 kHz to 2.8 kHz to 400 Hz to 200 Hz crystal filters does -not- significantly increase IMD in the K3. Just the opposite - Using narrow filters improves both third order IMD and Blocking IMD at close spacings. As an example, we're seeing third order IMD D.R. numbers on 20M at 20 kHz spacings in excess of 104 dB and 97 dB at 5 kHz with the 400 Hz filter ahead of the DSP. These numbers are much worse if you do not use a narrow crystal filter (400 Hz used for this test) ahead of the DSP. We were very careful not to make the same mistakes made by other radio designs. Just as we did on the K2, which has a very similar first IF crystal filtering scheme, we have paid special attention to receiver gain stage balancing, proper isolation between the crystal filters and their surrounding amplifier stages and balancing the thresholds where hardware AGC and DSP AGC trade off their activation. Other areas of our design focus for optimal dynamic range are the PIN diode type and bias levels in the T/R switching area, the design of our front end band-pass filters, the core sizes used in those filters and interstage transformers and the IMD performance of the crystal filters. We chose INRAD as our OEM 8-pole crystal filter supplier because of their excellent filter performance. In order to achieve a K3 blocking dynamic range (desense) in the 140 dB+ range, you -must- use a narrow crystal filter (400 Hz for closer interfering signal spacings) in front of the DSP. We use hardware AGC after the narrow crystal filter and ahead of the DSP to protect the DSP when signals inside the crystal filter exceed a 100 dB dynamic range. If you only use the 2.7 kHz stock filter for CW or data operation you will be significantly desensed once signals within that filter's bandwidth exceed about S9+25. This is before phase noise from the transmitting station becomes a factor. Not uncommon on 40M at night, during a contest or at a multi-op station. (Or every day in major cities ;-) Changing to a 400-500 Hz filter reduces blocking from signals 1-5 kHz away. I've personally confirmed this on the air with my K3 and the other commercial rigs we have here. when I've operated with the K3, or another DSP rig, on CW without using a narrow 400-500 Hz filter ahead of the DSP filtering, I frequently experienced desense (BDR) from nearby signals. Putting in the narrower crystal filter immediately cleaned it up. Using narrow crystal filters ahead of the DSP also reduces AGC pumping from static crashes on 80/160M etc. My personal real-world operating -basic- filter recommendations? In a nutshell: SSB: 2.7 kHz or 2.8 kHz CW/DATA: 400Hz or 500Hz (Narrower for Data if you prefer) AM: 6 kHz (And for wider SSB TX. We can select which filter you TX through and limit SSB b/w in the K3's DSP) FM: FM b/w filter (I believe its in the 13 kHz range.) Add narrower/wider filters as you prefer. I like to use the 1.0 kHz crystal filter when tuning a crowded band or listening to a pile up. I use the 2.1 kHz SSB filter on RX when someone crowds me on SSB. We provide 5 crystal filter slots per RX to accommodate a wide range of personal operating preferences. Notes: 1. The stock 2.7 kHz filter is fine for most SSB operation. Since we also transmit through this filter, for wider TX bandwidth and slightly sharper RX stop-band skirts you may prefer the 2.8 kHz 8-pole filter. For wider 'hi-fi' SSB TX, you will need to transmit through the 6 kHz AM filter and let the DSP limit your ultimate bandwidth to something like 3-3.5 kHz. 2. For most CW operation I recommend the 400/500 and 200/250 Hz crystal filters. I personally find the 400-500 Hz easiest to listen to for most casual CW operation, but I use the 200/250 Hz filters to dig out the weak ones when there is a lot of nearby interfering activity. Finally, until
Re: [Elecraft] KUSB for K3
On Mon, 7 May 2007, Brian Lloyd wrote: I think you mean that many no longer use RS-232 serial. I agree with you that RS-232 no longer makes a lot of sense. Yes, another famous TLC typo (g). If I can't a converter to work, I'll get a card and waste a slot First thing to do is go to Dell and upgrade the drivers for your USB port/hub in your computer. The auto updates are on...the Dell Dwarfs stay up 24/7 just to update my machine. You also might consider using a bootable CD with Linux on it to see if their drivers will work properly with your hardware. You've lost me...test Linux drivers to see if there is a problem with Windows drivers or with the hardware??? With the world using USB, I am amazed that people don't include a USB interface. If Elecraft opted for having their own USB device then they would have to provide drivers for Windows, something I would not want to do if I were them as it would raise their tech-support requirement. By doing what they have done they have pushed the USB/converter/driver problem to someone else. That makes a lot of sense to me. But from a customer standpoint, it makes no sense whatsover. Putting it another wayIf I am faced with replacing an expensive computer system to interface with a $2000 plus device, I would be upset at having bought the device...and if I hadn't already purchased it, I would pass on the whole thing. OTOH I am strongly of the opinion that USB is still too low-level and hardware dependent. Ethernet makes a lot more sense as just about every computer made today has ethernet and supports TCP/IP networking. It would open up many more applications than would USB and certainly a lot more than RS-232. Many hams have either a cable or a DSL connection to the Internet. That implies that they have ethernet running already. But many hams have very old computersand so that would knock them out of the box. From my perspective Elecraft would need to have a USB interface(Not an adapter), and a serial interface. Your concept of Ethernet is interesting, but could be not only a challenge to some, but an impossibility for folks with older units. After all, I could use my old Osborne to control the K3the K3 would fit on top of the luggable. 73,Thom-k3hrn www.zerobeat.net Home of QRP Web Ring, Drakelist home page,Drake Web Ring, QRP IRC channel, Drake IRC Channel, Elecraft Owners Database www.tlchost.net/hosting/ *** Web Hosting as low as 3.49/month ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KUSB for K3
Windows loads USB drivers based on the vendor id and product id reported by the device. Are you implying that MacOS and Linux do it differently, by saying the driver used is based on the chip? 73, Jim So, getting USB to work depends on the following: 1. the chip(s) implementing the USB port in your computer; 2. the driver for the chip implementing the USB port in your computer; 3. the chip(s) implementing the serial-to-USB adaptor; 4. the driver provided with the serial-to-USB adaptor. If you are using a MacOS, Linux, or a flavor of UNIX you will find that there tend to be only a few generic drivers for this since the drivers are based on the chip(s) used. Windows requires a vendor- specific driver for each device. The latter means that even if you get the same hardware (serial-to-USB converter) from two different vendors (generic Taiwanese serial-to-USB adaptor), you need two different drivers for Windows but only one generic driver with MacOS, Linux, or *NIX. 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Crystal Filters and Dynamic Range - D.R. impact and my basic recommendations
WA6HHQ: >We were very careful not to make the same mistakes made by other radio designs. Thank you Eric! Sorry for being paranoid but the old axiom "Fool me once...shame on you. Fool me twice...shame on me." applies to me personally since I have been burned before...hence my caution. Congratulations on the excellent IMD/BDR results! Looks like another winner to me. 73, Bill W4ZV P.S. I would still like to see complete results for all the filters when you have a chance to publish them. For the very narrow CW filters (500 Hz and below), I would love to see results at 1 kHz spacings. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] re: Improvements for the KX1
A lot of PDFs are available that are not searchable. ALL the Elecraft PDFs (and any I produce too) are searchable. It's the only sane way to do it, but it's certainly not the only way. Dan / WG4S / K2 #2456 -Original Message- From: Ian Stirling [mailto:[EMAIL PROTECTED] Sent: Monday, May 07, 2007 4:43 PM To: Dan Barker Subject: Re: [Elecraft] re: Improvements for the KX1 On Sunday 06 May 2007 08:44:33 you wrote: > Adobe is your friend. > > I did a search for c181, and found the I.F.OUT you mention. > > Searching for I.F.OUT, I find it goes through J6/P6 to the Control board, > and then to the AGC mixer(NE602). Thanks Dan - that's the first positive comment I've heard on the distribution of documents as PDF files. Even though they can be searched if they contain text and font information rather than a graphic image of text, I have only ever looked at a printed version if available. 73, Ian, G4ICV, AB2GR, K2 #4962 -- ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Re: start without ANY extra roofing filters....
I was also concerned about so many filters until I realized Elecraft has actually leveraged the Inrad 7XX series of filters offered for the 8.215 MHz IF of the FT-1000 family. I suspect This is an interesting point! Makes me wonder about the 1.8kHz filter for SSB contesting. designs. I will be especially interested in seeing IMD/BDR measurements for the variable filters since *variable* also may imply *variable* IMD/BDR results (depending on BW). Especially, as it would seem to me, if the diodes used to tune the filters cause any problems. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Crystal Filters and Dynamic Range - D.R. impact and my basic recommendations
WA6HHQ: >Notes: Since we also transmit through this (2.7 kHz) filter... Will it be possible to transmit CW through a narrower filter than the 2.7 kHz to even further minimize transmitted key clicks and phase noise? If so, how low in BW could we go before causing problems? 1 kHz, 500 Hz or even lower? 73, Bill W4ZV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KUSB for K3
On Sun, 6 May 2007, Don Wilhelm wrote: Thom, I guess I should have said *WILL* know - I don't know the answer yet, but I have faith that the answer will be available. Maybe Elecraft will ship me a KUSBI am trying to find my wrap plug. I'd like someway to test the serial/usb convertor. Or...I could volunteer to be the K3<>Dell USB Beta tester (g). 73,Thom-k3hrn www.zerobeat.net Home of QRP Web Ring, Drakelist home page,Drake Web Ring, QRP IRC channel, Drake IRC Channel, Elecraft Owners Database www.tlchost.net/hosting/ *** Web Hosting as low as 3.49/month ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3 Crystal Filters and Dynamic Range - D.R. impact and my basic recommendations
Bill, Setting the TX filter for CW is a menu config option. I'm not sure what testing as been done yet to outline the TX characteristics of the narrower filters though. 73, Greg AB7R On Mon, 07 May 2007 17:43:14 -0400 Bill Tippett <[EMAIL PROTECTED]> wrote: WA6HHQ: >Notes: Since we also transmit through this (2.7 kHz) filter... Will it be possible to transmit CW through a narrower filter than the 2.7 kHz to even further minimize transmitted key clicks and phase noise? If so, how low in BW could we go before causing problems? 1 kHz, 500 Hz or even lower? 73, Bill W4ZV ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] KUSB for K3
Linux uses vendor and product id as well, but there is wildcard matching, so the driver is loaded based on the match. Linux has a more flexible architecture for USB hotplug, so it is up to the distribution or the upstream provider of the USB system to decide what driver to load, not the manufacturer of the peripheral. Also, in Windows, what is called the "driver" is often a driver and an application program to be autorun when the device is detected. For RS232 dongles, there is no application program, but for some device that happens to incorporate the same chip but wants to autolaunch an app, there is. For example, the Vector Network Analyzer from Mini Radio Solutions uses such a chip to provide USB connectivity, although it is inherently a serial device. When I plug it in to Windows, it uses a generic driver I had to manually install, and it maps the device to some random COM port, using a number that changes from time to time; sometimes it is COM11, sometimes COM13. I have to find the init file for the VNA software and edit it. When I plug it in to Linux, it gets assigned the next device number, and for some reason it seems stable, so I can leave the init file set as /dev/ttyUSB1. (My K2 is on hardware RS232 port /dev/ttyS0 and my antenna controller on /dev/ttyUSB0). If the MiniRadioSolutions people had gone all out, they could have gotten a special id and written something that runs their Visual Basic program automatically, but then upgrading it would have been a constant pain for hams who want to change it or try out other versions. Still, not having to look for the COM port would have been nice, and that is mainly what the USB driver system in Windows tries to solve with its id system. The price we all pay, though, is a complete failure for generic devices such as RS232 converters. When I put an SD card from my camera into my Linux box, it notices it, finds that it has a Win32 DOS filesystem on it, finds the driver, and mounts it as a filesystem. Thw Gnome window system I run at home then notices the mounted filesystem, susses out the directory structure and guesses that is is from a camera (and not a USB memory stick for files or an MP3 player) and offers to start a photo edit/drag-and-drop tool. No manufacturer of camera or SD card was involved. (I suspect the Mac does the same thing, only in a more refined way and with prettier icons.) 73, Leigh/WA5ZNU On Mon, 7 May 2007 1:41 pm, James austin wrote: Windows loads USB drivers based on the vendor id and product id reported by the device. Are you implying that MacOS and Linux do it differently, by saying the driver used is based on the chip? 73, Jim So, getting USB to work depends on the following: 1. the chip(s) implementing the USB port in your computer; 2. the driver for the chip implementing the USB port in your computer; 3. the chip(s) implementing the serial-to-USB adaptor; 4. the driver provided with the serial-to-USB adaptor. If you are using a MacOS, Linux, or a flavor of UNIX you will find that there tend to be only a few generic drivers for this since the drivers are based on the chip(s) used. Windows requires a vendor- specific driver for each device. The latter means that even if you get the same hardware (serial-to-USB converter) from two different vendors (generic Taiwanese serial-to-USB adaptor), you need two different drivers for Windows but only one generic driver with MacOS, Linux, or *NIX. 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] test, pse disregard.
___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 FS in EU
I buy a K3 and sell my K2 in EU : recently built and aligned ( # 5632 ) by an experienced US builder and perfectly working. Options : SSB, DSP, internal ATU, 160 mtr RxTx module, internal battery, RS232 I/O interface. I also checked OK the main specs in my measurement lab : MDS, BDR, IMD3DR, IP3, IP2, Tx harmonics surpression and Tx IMD3. Asking € 900. Peter, PE1E. BTW : also FS a FT100 and a FT100D, make me an offer. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] 2nd RX and roofing filters (sought of)
Hi, I hope I am not over looking anything the FAQ or the stream of mails during the last several days. If not, this might be something for the FAQ. If I have understood correctly, the filters which one wants to use for TX must be in the standard receiver and not in the KRX3 . In my case that would mean that the FM bandwidth filter will end up in the primary rx. I have also ordered the 6kHz filter, mainly for SWLing. As far as other filters are concerned, I have not made any final decision yet. One idea that I have, is to set up one receiver as a general purpose RX and trim the other RX for good contest performance. Assuming, just for the sake of argument (without caring about how sense this combination of filters actually makes), that the filters are set up like this: standard RX | KRX3 +-- FM | 2700 Hz | 2100 Hz 6000 Hz | 1800 Hz 2700 Hz | 500 Hz 500 Hz | 250 Hz Will it be possible to have the KRX3 act as the primary RX during contests while using the standard RX as the secondary, and vice versa when not contesting? Among other things, I assume, this would mean the tuning for the KRX3 and TX would be on the "big knob" and the tuning for the secondary (standard) RX would be on the "small knob". If so, would this entail any limitations and will this be transparent for the OP (important after 30 or more hours of no sleep)? vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? (< #200) DOK C12, BCC, DL-QRP-AG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] TenTec 701 Hand Mike wiring
Greetings Elecrafters! Just received my TenTec 701 hand mike in the mail today, for use with my K2. I am going to jumper the K2 straight across (the Elecraft mode), and rewire the 701 to fit it. Can anyone confirm the wiring on the 701? I think it is: Braid - Ground Black - PTT Red - Power Yellow - Microphone Please confirm if you are able. Thanks in advance. 73, Mike N4JX K1/4 2319 K2 6042 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] TenTec 701 Hand Mike wiring
you are correct. Kurt - K0ARO Braid - Ground Black - PTT Red - Power Yellow - Microphone Please confirm if you are able. Thanks in advance. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Crystal Filters and Dynamic Range - D.R. impact and my basic recommendations
WA6HHZ explained "We chose INRAD as our OEM 8-pole crystal filter supplier because of their excellent filter performance." I hope Elecraft will consider offering the Inrad 1.8Khz 8-pole filter 8.215Mhz if (711-B) for the K3, or even something narrower, for ssb contesting. I assume the K3 will be able to transmit through the stock 2.7Khz filter and switch in a narrower filter when receiving. 73, Barry N1EU ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Vol 37 17 Message 38
Eric You mention a 2.1 SSB filter !!!Will this be another option ? 73 JOHN VK4OQ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K3 Request info (when you have time)
Wayne, Eric, et al: I'd love to see (hear) an audio file posted (FAQ?) demonstrating the "very fast and much faster than the K2" QSK at various speeds (40wpm and up). Please make sure there is another QSO on frequency. :-) thanks, de Doug KR2Q ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Elecraft UK Distribution. No Thank You!
This little thread has got me alarmed. In fact when I looked once more on the Elecraft site (to see if I could in fact theoretically afford a K3) I now see that Japanese orders can ONLY be made through the official Japanese distributor. "Note: All Japan orders (including K3) must be placed through our distributor: EDC" I urge Elecraft NOT to enter into any exclusive deal with a UK based radio dealer. I suspect that many K3 orders will be initially for the basic unit but with a view to adding (many) extras over time. If I thought that a UK dealer would be the only outlet for Elecraft K3 accessories in the future it would stop me from even not ordering the basic unit in the first place. In the USA you earn considerably more than us in England and it is a sad fact that out dealers (albeit they provide a service so I am not just making a cheap criticism of them) still charge the same in £ as you pay in $. Effectively twice the price. There is no escaping the fact that here in England a K3 even at your current prices is a luxury product likely to be bought by those who would otherwise desire, but be perhaps unable to afford, an Orion II (currently $7,200 with ATU though to a US citizen ordering from the Ten-Tec site direct the price is $4,395). If you make an exclusive deal with a dealer here I think you will kill the market entirely: Kill it stone dead. To make matters worse, unless you are able to reassure potential customers now that they can add extras to be bought directly from you in the future then sales to the UK will be further reduced. When I saw the reference to orders from Japan it stopped me in my tracks. I cannot afford a K3 right now (although I was considering a transverter kit) so you have not actually lost a K3 sale but I believe that you will lose many sales (maybe even most of them) if you follow the Japanese route. I am not just being a miserable doom merchant. I have no regrets at buying my K2 from you and would consider the K3 in the future (if I have the money). I wish your company every success. Dominic G4SLW K2 #3071 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Elecraft UK Distribution. No Thank You!
We will not be entering into any exclusive dealer relationships in Europe. Regardless of who may be selling K3s Europe, we will always accept direct Internet orders. 73, Eric WA6HHQ Elecraft Dominic G4SLW wrote: I urge Elecraft NOT to enter into any exclusive deal with a UK based radio dealer. ... Dominic G4SLW K2 #3071 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Vol 37 17 Message 38
Yes, it has been added to the K3 order form at: http://www.elecraft.com/elecraft_prod_list.htm 73, Eric WA6HHQ --- john bazley wrote: Eric You mention a 2.1 SSB filter !!!Will this be another option ? 73 JOHN VK4OQ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] N0SS Zero Beat detector too active
Folks, I recall seeing a post sometime back about reducing the input to the N0SS tuning indicator, but I have not been able to locate it. As I recall it was only a series resistor, but can someone tell me the value used before I begin re-inventing the wheel. While I have K2 SN 00020 open on the bench, I would like to add this, my zero beat indicator is way too sensitive. 73, Don W3FPR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] TenTec 701 Hand Mike wiring
Great Don. Thanks! 73, Mike N4JX - Original Message - From: "Don Wilhelm" <[EMAIL PROTECTED]> To: "Mike Geddes" <[EMAIL PROTECTED]> Sent: Monday, May 07, 2007 7:23 PM Subject: Re: [Elecraft] TenTec 701 Hand Mike wiring Mike, You are correct - wire the Yellow lead to pin 1, Black to pin 2, Braid to pin 7 and Red to pin 6. You do not need any resistor on the mic jack, but if you already have a 5.6k mounted between pins 1 and 6 (so the Elecraft mics will work), the TenTec mike will work fine with it installed. 73, Don W3FPR Mike Geddes wrote: Greetings Elecrafters! Just received my TenTec 701 hand mike in the mail today, for use with my K2. I am going to jumper the K2 straight across (the Elecraft mode), and rewire the 701 to fit it. Can anyone confirm the wiring on the 701? I think it is: Braid - Ground Black - PTT Red - Power Yellow - Microphone Please confirm if you are able. Thanks in advance. 73, Mike N4JX K1/4 2319 K2 6042 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] N Connectors
Hi Greg, I assume that the SO-239s in the K3 are screwed in place (ala the KPA100), not riveted... If this is the case, it really shouldn't be too difficult for many Elecraft builders to just install the N connector if so desired, should it? ;o) Wish I could be at Dayton this year! Thanks for fielding the question pileups. Cheers, Julius n2wn ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: [QRP-L] WA3WSJ's AT Hike & QRP
In a message dated 5/7/07 10:05:21 AM Eastern Daylight Time, [EMAIL PROTECTED] writes: > I'll start in the Town of Duncannon, PA and end at Swatara State > Park, PA. How will you cross the Susquehanna River? Good luck and enjoy the trek. 73 de Jim, N2EY ** See what's free at http://www.aol.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] N0SS Zero Beat detector too active
Don, You cannot possibly imagine how pleased I am to be able to answer one of YOUR questions! The resistor is a 93.1 K and is supplied as a SMD. 73, Tom -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Don Wilhelm Sent: Monday, May 07, 2007 8:04 PM To: Elecraft reflector Subject: [Elecraft] N0SS Zero Beat detector too active Folks, I recall seeing a post sometime back about reducing the input to the N0SS tuning indicator, but I have not been able to locate it. As I recall it was only a series resistor, but can someone tell me the value used before I begin re-inventing the wheel. While I have K2 SN 00020 open on the bench, I would like to add this, my zero beat indicator is way too sensitive. 73, Don W3FPR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] N0SS Zero Beat detector too active
Don, As I look over the photo that came with the little SMD I see that there are really two options, one placing the SMD on the N0SS board and another putting a couple of 47 K resistors in series on the K2 board where the output goes to the N0SSoard. So, I guess the exact value isn't critical -93.1K - 94K - what have you. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Don Wilhelm Sent: Monday, May 07, 2007 8:04 PM To: Elecraft reflector Subject: [Elecraft] N0SS Zero Beat detector too active Folks, I recall seeing a post sometime back about reducing the input to the N0SS tuning indicator, but I have not been able to locate it. As I recall it was only a series resistor, but can someone tell me the value used before I begin re-inventing the wheel. While I have K2 SN 00020 open on the bench, I would like to add this, my zero beat indicator is way too sensitive. 73, Don W3FPR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] 2nd RX and roofing filters (sought of)
Toby, Transmit filtering is accomplished in DSP and with the crystal IF roofing filters ON THE MAIN RX board. If you have the subreceiver option installed, all you have to do is select VFO B to use it. The RX filters on the sub RX board will then come into play, but you must remember that only the filters on the main RX board will be used for transmit. VFO B tuning will be done with the smaller knob. If you want to tune with the large tuning knob, you can use the A<>B button. But if you do, the filters on the main RX will be in play. Hope this helps! 73 Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Toby Deinhardt Sent: Monday, May 07, 2007 3:31 PM To: elecraft@mailman.qth.net Subject: [Elecraft] 2nd RX and roofing filters (sought of) Hi, I hope I am not over looking anything the FAQ or the stream of mails during the last several days. If not, this might be something for the FAQ. If I have understood correctly, the filters which one wants to use for TX must be in the standard receiver and not in the KRX3 . In my case that would mean that the FM bandwidth filter will end up in the primary rx. I have also ordered the 6kHz filter, mainly for SWLing. As far as other filters are concerned, I have not made any final decision yet. One idea that I have, is to set up one receiver as a general purpose RX and trim the other RX for good contest performance. Assuming, just for the sake of argument (without caring about how sense this combination of filters actually makes), that the filters are set up like this: standard RX | KRX3 +-- FM | 2700 Hz | 2100 Hz 6000 Hz | 1800 Hz 2700 Hz | 500 Hz 500 Hz | 250 Hz Will it be possible to have the KRX3 act as the primary RX during contests while using the standard RX as the secondary, and vice versa when not contesting? Among other things, I assume, this would mean the tuning for the KRX3 and TX would be on the "big knob" and the tuning for the secondary (standard) RX would be on the "small knob". If so, would this entail any limitations and will this be transparent for the OP (important after 30 or more hours of no sleep)? vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? (< #200) DOK C12, BCC, DL-QRP-AG ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] N0SS Zero Beat detector too active
Tom and all, Thanks to all who responded. I promise to make a permanent note of it so I can refer others to it should they ask (I just can't remember everything, and I have earned the 'senior moment' excuse to fall back on if necessary ). The collective memory of this group is a valuable resource. Thank you all. 73, Don W3FPR KJ3D wrote: Don, You cannot possibly imagine how pleased I am to be able to answer one of YOUR questions! The resistor is a 93.1 K and is supplied as a SMD. 73, Tom -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Don Wilhelm Sent: Monday, May 07, 2007 8:04 PM To: Elecraft reflector Subject: [Elecraft] N0SS Zero Beat detector too active Folks, I recall seeing a post sometime back about reducing the input to the N0SS tuning indicator, but I have not been able to locate it. As I recall it was only a series resistor, but can someone tell me the value used before I begin re-inventing the wheel. While I have K2 SN 00020 open on the bench, I would like to add this, my zero beat indicator is way too sensitive. 73, Don W3FPR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 2nd RX and roofing filters (sought of)
Hi Greg & Lyle, Does this mean that one can not reconfigure the radio so that either RX is considered to be the main RX? In other words, one can not directly tune the KRX3 using the large knob? It would be nice if one choose (independent of the logical VFOs A & B) which RX is tuned by which knob. Obvisiously, if the KRX3 is being used as the "main" RX, then the VFO of the standard RX/TX would have switch frequencies between RX and TX very quickly, assuming that it is tuned to a different RX frequency. Possible? Not possible? vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? (< #200) DOK C12, BCC, DL-QRP-AG - Original Message - From: "Greg" <[EMAIL PROTECTED]> To: "Toby Deinhardt" <[EMAIL PROTECTED]>; Cc: "Lyle Johnson" <[EMAIL PROTECTED]> Sent: Tuesday, May 08, 2007 6:11 AM Subject: RE: [Elecraft] 2nd RX and roofing filters (sought of) Toby, Transmit filtering is accomplished in DSP and with the crystal IF roofing filters ON THE MAIN RX board. If you have the subreceiver option installed, all you have to do is select VFO B to use it. The RX filters on the sub RX board will then come into play, but you must remember that only the filters on the main RX board will be used for transmit. VFO B tuning will be done with the smaller knob. If you want to tune with the large tuning knob, you can use the A<>B button. But if you do, the filters on the main RX will be in play. Hope this helps! 73 Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Toby Deinhardt Sent: Monday, May 07, 2007 3:31 PM To: elecraft@mailman.qth.net Subject: [Elecraft] 2nd RX and roofing filters (sought of) Hi, I hope I am not over looking anything the FAQ or the stream of mails during the last several days. If not, this might be something for the FAQ. If I have understood correctly, the filters which one wants to use for TX must be in the standard receiver and not in the KRX3 . In my case that would mean that the FM bandwidth filter will end up in the primary rx. I have also ordered the 6kHz filter, mainly for SWLing. As far as other filters are concerned, I have not made any final decision yet. One idea that I have, is to set up one receiver as a general purpose RX and trim the other RX for good contest performance. Assuming, just for the sake of argument (without caring about how sense this combination of filters actually makes), that the filters are set up like this: standard RX | KRX3 +-- FM | 2700 Hz | 2100 Hz 6000 Hz | 1800 Hz 2700 Hz | 500 Hz 500 Hz | 250 Hz Will it be possible to have the KRX3 act as the primary RX during contests while using the standard RX as the secondary, and vice versa when not contesting? Among other things, I assume, this would mean the tuning for the KRX3 and TX would be on the "big knob" and the tuning for the secondary (standard) RX would be on the "small knob". If so, would this entail any limitations and will this be transparent for the OP (important after 30 or more hours of no sleep)? vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 2nd RX and roofing filters (sought of)
Oh boy never write an e-mail before awaking fully... sorry Hi Greg & Lyle, Does this mean that one can not reconfigure the radio so that either RX is considered to be the main RX? In other words, one can not directly tune the KRX3 using the large knob? It would be nice if one could choose (independent of the logical VFOs A & B) which RX is tuned by which knob. Obvisiously, if the KRX3 is being used as the "main" RX, then the VFO of the standard RX/TX would have to switch frequencies, between RX and TX, very quickly, assuming that it is tuned to a different RX frequency. Possible? Not possible? vy 73 de toby -- DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz) K2 #885, K2/100 #3248 K3/100 #??? (< #200) DOK C12, BCC, DL-QRP-AG - Original Message - From: "Greg" <[EMAIL PROTECTED]> To: "Toby Deinhardt" <[EMAIL PROTECTED]>; Cc: "Lyle Johnson" <[EMAIL PROTECTED]> Sent: Tuesday, May 08, 2007 6:11 AM Subject: RE: [Elecraft] 2nd RX and roofing filters (sought of) Toby, Transmit filtering is accomplished in DSP and with the crystal IF roofing filters ON THE MAIN RX board. If you have the subreceiver option installed, all you have to do is select VFO B to use it. The RX filters on the sub RX board will then come into play, but you must remember that only the filters on the main RX board will be used for transmit. VFO B tuning will be done with the smaller knob. If you want to tune with the large tuning knob, you can use the A<>B button. But if you do, the filters on the main RX will be in play. Hope this helps! 73 Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Toby Deinhardt Sent: Monday, May 07, 2007 3:31 PM To: elecraft@mailman.qth.net Subject: [Elecraft] 2nd RX and roofing filters (sought of) Hi, I hope I am not over looking anything the FAQ or the stream of mails during the last several days. If not, this might be something for the FAQ. If I have understood correctly, the filters which one wants to use for TX must be in the standard receiver and not in the KRX3 . In my case that would mean that the FM bandwidth filter will end up in the primary rx. I have also ordered the 6kHz filter, mainly for SWLing. As far as other filters are concerned, I have not made any final decision yet. One idea that I have, is to set up one receiver as a general purpose RX and trim the other RX for good contest performance. Assuming, just for the sake of argument (without caring about how sense this combination of filters actually makes), that the filters are set up like this: standard RX | KRX3 +-- FM | 2700 Hz | 2100 Hz 6000 Hz | 1800 Hz 2700 Hz | 500 Hz 500 Hz | 250 Hz Will it be possible to have the KRX3 act as the primary RX during contests while using the standard RX as the secondary, and vice versa when not contesting? Among other things, I assume, this would mean the tuning for the KRX3 and TX would be on the "big knob" and the tuning for the secondary (standard) RX would be on the "small knob". If so, would this entail any limitations and will this be transparent for the OP (important after 30 or more hours of no sleep)? vy 73 de toby ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com __ NOD32 2248 (20070507) Information __ This message was checked by NOD32 antivirus system. http://www.eset.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
